Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
config(gdm)
gdm
gdm(x86-64)
gdm2
gnome-applets-gdm

Requires :

libgdk-3.so.0()(64bit)
libc.so.6()(64bit)
libpam.so.0(LIBPAM_1.0)(64bit)
libsystemd.so.0()(64bit)
libXdmcp.so.6()(64bit)
libgtk-3.so.0()(64bit)
libgio-2.0.so.0()(64bit)
libpam.so.0()(64bit)
glib2-tools
gdmflexiserver
libaccountsservice.so.0()(64bit)
libXau.so.6()(64bit)
sed
insserv
libcanberra.so.0()(64bit)
libcanberra-gtk3.so.0()(64bit)
libgobject-2.0.so.0()(64bit)
gnome-shell
gdm-branding = 3.10.0.1
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
gnome-settings-daemon
libX11.so.6()(64bit)
/bin/sh
libwrap.so.0()(64bit)
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
pwdutils
libpthread.so.0(GLIBC_2.2.5)(64bit)
libpthread.so.0()(64bit)
rpmlib(CompressedFileNames) <= 3.0.4-1
config(gdm) = 3.10.0.1-13.1
libc.so.6(GLIBC_2.4)(64bit)
rpmlib(PayloadIsLzma) <= 4.4.6-1
libgdk_pixbuf-2.0.so.0()(64bit)
libglib-2.0.so.0()(64bit)
dconf
gnome-session-core
libc.so.6(GLIBC_2.3)(64bit)
xorg-x11-server-extra
libXrandr.so.2()(64bit)
libgdm.so.1()(64bit)
libsystemd.so.0(LIBSYSTEMD_209)(64bit)

Content of RPM :
/etc/dbus-1/system.d/gdm.conf
/etc/dconf/db/gdm
/etc/dconf/db/gdm.d
/etc/dconf/db/gdm.d/00-upstream-settings
/etc/dconf/db/gdm.d/locks
/etc/dconf/db/gdm.d/locks/00-upstream-settings-locks
/etc/dconf/profile/gdm
/etc/gdm
/etc/gdm/Init
/etc/gdm/Init/Default
/etc/gdm/PostLogin
/etc/gdm/PostLogin/Default
/etc/gdm/PostSession
/etc/gdm/PostSession/Default
/etc/gdm/PreSession
/etc/gdm/PreSession/Default
/etc/gdm/Xsession
/etc/pam.d/gdm
/etc/pam.d/gdm-autologin
/etc/pam.d/gdm-fingerprint
/etc/pam.d/gdm-launch-environment
/etc/pam.d/gdm-password
/etc/pam.d/gdm-smartcard
/run/gdm
/usr/bin/gdm
/usr/bin/gdm-screenshot
/usr/lib/X11/displaymanagers
/usr/lib/X11/displaymanagers/gdm
/usr/lib/gdm
/usr/lib/gdm/gdm-host-chooser
There is 42 files more in these RPM.